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DBSCAN Revisited, Revisited: Why and How You Should (Still) Use DBSCAN

Schubert, Erich, Sander, Jörg, Ester, Martin, Kriegel, Hans Peter, Xu, Xiaowei·2017·ACM Transactions on Database Systems

Abstract

At SIGMOD 2015, an article was presented with the title “DBSCAN Revisited: Mis-Claim, Un-Fixability, and Approximation” that won the conference’s best paper award. In this technical correspondence, we want to point out some inaccuracies in the way DBSCAN was represented, and why the criticism should have been directed at the assumption about the performance of spatial index structures such as R-trees and not at an algorithm that can use such indexes. We will also discuss the relationship of DBSCAN performance and the indexability of the dataset, and discuss some heuristics for choosing appropriate DBSCAN parameters. Some indicators of bad parameters will be proposed to help guide future users of this algorithm in choosing parameters such as to obtain both meaningful results and good performance. In new experiments, we show that the new SIGMOD 2015 methods do not appear to offer practical benefits if the DBSCAN parameters are well chosen and thus they are primarily of theoretical interest. In conclusion, the original DBSCAN algorithm with effective indexes and reasonably chosen parameter values performs competitively compared to the method proposed by Gan and Tao.

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Metadata

Authors
Schubert, E., Sander, J., Ester, M., Kriegel, H. P., & Xu, X.
Venue
ACM Transactions on Database Systems
Published
2017-07-31
Volume
42
Issue
3
Pages
1-21
ISSN
  • 0362-5915 (ISSN-L)
  • 1557-4644
OpenAlex
W2740924709
Cited by
2,737
References
35
FWCI
85.69
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: DBSCAN Revisited, Revisited: Why and How You Should (Still) Use DBSCAN. https://app.cochat.ai/papers/10.1145/3068335
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Schubert, E., Sander, J., Ester, M., Kriegel, H. P., & Xu, X. (2017). DBSCAN Revisited, Revisited: Why and How You Should (Still) Use DBSCAN. ACM Transactions on Database Systems. https://doi.org/10.1145/3068335

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